8. Replacing the O-rings (X450L/X450)
Replace the O-rings if water is present in the exhaust air line. This is an indication of possible water leakage
within the coupling. ALWAYS change the complete set of O-rings.
1) Loosen and Remove the taper ring at the rear of the handpiece. (Fig. 13)
2) Gently remove each O-ring by hand. (Fig. 14)
3) Insert the complete set of new O-rings in the correct grooves.
4) Replace and firmly tighten the taper ring.
*Refer to Spare Parts List to identify the correct parts.
CAUTION
· Do not force the new replacement O-ring with excessive pressure.
· When inserting new O-rings, make sure they are inserted in the correct grooves.
· Make certain that the taper ring is firmly tightened. If the taper ring is loose water and air leakage
could occur.
Taper Ring
Fig. 13
O-ring
Fig. 14
15